SSL3_GET_RECORD:wrong version number sending any emails since upgrading past 0.37

Your Rocket.Chat version: 0.47

We've had this issue for a while and I've done a lot of searching.
Since we upgraded past 0.37 we get the error sending any email. Registration, notification and the admin "test" button all produce the error.

We're inside of a corporate LAN with an SMTP relay that requires no authentication.

I experimented with changing the user and password which only produced an invalid login error.

Below is the log file from the most recent upgrade till now.

[34mI20161208-17:02:12.089(0) Updating process.env.MAIL_URL 
[34mI20161208-17:02:22.158(0) ufs: store created at  
[34mI20161208-17:02:23.300(0) ufs: store created at  
[34mI20161208-17:02:37.260(0) (rocketchat_migrations.js:160) Migrations: Migrating from version 64 -> 68
[34mI20161208-17:02:37.277(0) (rocketchat_migrations.js:160) Migrations: Running up() on version 65
[34mI20161208-17:02:39.243(0) (rocketchat_migrations.js:160) Migrations: Running up() on version 66
[34mI20161208-17:02:39.306(0) (rocketchat_migrations.js:160) Migrations: Running up() on version 67
[34mI20161208-17:02:39.327(0) (rocketchat_migrations.js:160) Migrations: Running up() on version 68
[34mI20161208-17:02:39.386(0) (rocketchat_migrations.js:160) Migrations: Finished migrating.
[34mI20161208-17:02:49.389(0) [33mNot migrating, control is locked. Attempt 1/30. Trying again in 10 seconds. 
[34mI20161208-17:02:49.398(0) (rocketchat_migrations.js:160) Migrations: Not migrating, already at version 68
[34mI20161208-17:02:49.933(0) Updating process.env.MAIL_URL 
[34mI20161208-17:02:51.898(0) [32mUsing GridFS for custom emoji storage 
[34mI20161208-17:02:52.321(0) [Thu Dec 08 2016 17:02:52 GMT+0000 (GMT)] WARNING A script has tried registering a HTTP route while the HTTP server is disabled with --disabled-httpd. 
[34mI20161208-17:02:52.323(0) [32mLoaded hubot-help/src/help.coffee 
[34mI20161208-17:02:52.350(0) [32mLoaded hello.coffee 
[34mI20161208-17:02:52.368(0) [32mLoaded zen.coffee 
[34mI20161208-17:02:56.739(0) [32mUsing GridFS for Avatar storage 
[34mI20161208-17:02:57.358(0) [32m➔ app.js:3990 [32mSystem ➔ startup 
[34mI20161208-17:02:57.359(0) [32m➔ [32m+------------------------------------+ 
[34mI20161208-17:02:57.359(0) [32m➔ [32m|           SERVER RUNNING           | 
[34mI20161208-17:02:57.361(0) [32m➔ [32m+------------------------------------+ 
[34mI20161208-17:02:57.362(0) [32m➔ [32m|                                    | 
[34mI20161208-17:02:57.362(0) [32m➔ [32m|       Version: 0.47.0              | 
[34mI20161208-17:02:57.363(0) [32m➔ [32m|  Process Port: 3000                | 
[34mI20161208-17:02:57.363(0) [32m➔ [32m|      Site URL: http://server:3000  | 
[34mI20161208-17:02:57.363(0) [32m➔ [32m|         OpLog: Disabled            | 
[34mI20161208-17:02:57.363(0) [32m➔ [32m|                                    | 
[34mI20161208-17:02:57.364(0) [32m➔ [32m+------------------------------------+ 
[34mI20161209-06:19:18.868(0) Exception in defer callback: Error: 140142710757184:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:../deps/openssl/openssl/ssl/s3_pkt.c:362:   at Object.Future.wait (/opt/Rocket.Chat/programs/server/node_modules/fibers/future.js:449:15)   at smtpSend (packages/email.js:108:37)   at Object.Email.send (packages/email.js:211:5)   at /opt/Rocket.Chat/programs/server/packages/rocketchat_lib.js:1434:14   at [object Object]._.extend.withValue (packages/meteor.js:1122:17)   at packages/meteor.js:445:45   at runWithEnvironment (packages/meteor.js:1176:24)      - - - - -    at Error (native)  
[34mI20161209-06:19:21.803(0) Exception in defer callback: Error: 140142710757184:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:../deps/openssl/openssl/ssl/s3_pkt.c:362:   at Object.Future.wait (/opt/Rocket.Chat/programs/server/node_modules/fibers/future.js:449:15)   at smtpSend (packages/email.js:108:37)   at Object.Email.send (packages/email.js:211:5)   at /opt/Rocket.Chat/programs/server/packages/rocketchat_lib.js:1434:14   at [object Object]._.extend.withValue (packages/meteor.js:1122:17)   at packages/meteor.js:445:45   at runWithEnvironment (packages/meteor.js:1176:24)      - - - - -    at Error (native)  
[34mI20161209-08:11:15.506(0) Exception in defer callback: Error: 140142710757184:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:../deps/openssl/openssl/ssl/s3_pkt.c:362:   at Object.Future.wait (/opt/Rocket.Chat/programs/server/node_modules/fibers/future.js:449:15)   at smtpSend (packages/email.js:108:37)   at Object.Email.send (packages/email.js:211:5)   at /opt/Rocket.Chat/programs/server/packages/rocketchat_lib.js:1434:14   at [object Object]._.extend.withValue (packages/meteor.js:1122:17)   at packages/meteor.js:445:45   at runWithEnvironment (packages/meteor.js:1176:24)      - - - - -    at Error (native)  
[34mI20161209-09:20:14.421(0) Sending test email to my@email.address 
[34mI20161209-16:32:07.776(0) Exception in defer callback: Error: 140142710757184:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:../deps/openssl/openssl/ssl/s3_pkt.c:362:   at Object.Future.wait (/opt/Rocket.Chat/programs/server/node_modules/fibers/future.js:449:15)   at smtpSend (packages/email.js:108:37)   at Object.Email.send (packages/email.js:211:5)   at /opt/Rocket.Chat/programs/server/packages/rocketchat_lib.js:1434:14   at [object Object]._.extend.withValue (packages/meteor.js:1122:17)   at packages/meteor.js:445:45   at runWithEnvironment (packages/meteor.js:1176:24)      - - - - -    at Error (native)  
[34mI20161212-09:37:57.953(0) Sending test email to my@email.address 
[34mI20161212-09:38:32.224(0) rocketchat_lib rocketchat_lib.js:1011 [34mMeteor ➔ method sendSMTPTestEmail -> userId: 5aBdc5Mq2XHXS54bJ , arguments:  {} 
[34mI20161212-09:38:32.229(0) Sending test email to my@email.address 
[34mI20161212-09:38:37.999(0) rocketchat_lib rocketchat_lib.js:1011 [34mMeteor ➔ method saveSetting -> userId: 5aBdc5Mq2XHXS54bJ , arguments:  { '0': 'Log_Level', '1': '0', '2': null } 
[34mI20161212-09:47:30.270(0) Updating process.env.MAIL_URL 
[34mI20161212-09:47:33.191(0) Sending test email to my@email.address 
[34mI20161212-09:47:39.675(0) Updating process.env.MAIL_URL 
[34mI20161212-09:47:42.069(0) Sending test email to my@email.address 
[34mI20161212-09:48:00.839(0) Updating process.env.MAIL_URL 
[34mI20161212-09:48:02.969(0) Sending test email to my@email.address 
[34mI20161212-09:48:14.852(0) Updating process.env.MAIL_URL 
[34mI20161212-09:48:15.775(0) Sending test email to my@email.address 
[34mI20161212-09:48:21.540(0) Updating process.env.MAIL_URL 
[34mI20161212-10:01:31.769(0) Exception in defer callback: Error: 140142710757184:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:../deps/openssl/openssl/ssl/s3_pkt.c:362:   at Object.Future.wait (/opt/Rocket.Chat/programs/server/node_modules/fibers/future.js:449:15)   at smtpSend (packages/email.js:108:37)   at Object.Email.send (packages/email.js:211:5)   at /opt/Rocket.Chat/programs/server/packages/rocketchat_lib.js:1434:14   at [object Object]._.extend.withValue (packages/meteor.js:1122:17)   at packages/meteor.js:445:45   at runWithEnvironment (packages/meteor.js:1176:24)      - - - - -    at Error (native)  
[34mI20161212-10:21:49.058(0) Sending test email to my@email.address 

Start in packages/email.js at smtpSend, then trace the email call from packages/rocketchat_lib.js:1434 and the MAIL_URL updates shown in the log. Reproduce the failure with the reported unauthenticated SMTP relay and verify that registration, notifications, and the admin test email complete without the SSL error.